calendar/packages/trpc/server/routers/viewer/slots/reserveSlot.handler.test.ts

import { vi, describe, it, expect, afterEach } from "vitest";

// We want to test that the UID cookie set by reserveSlotHandler is configured with the correct
// SameSite and Secure attributes depending on the environment (http vs https).
// reserveSlotHandler relies on WEBAPP_URL being evaluated at import time, so we need to reset modules
// between tests after tweaking process.env to simulate different deployment environments.
//
// The handler also calls into Prisma and the SelectedSlotRepository, so we stub those parts out.

// We alias the module path once we know WEBAPP_URL has been configured.
const dynamicImportHandler = async () => await import("./reserveSlot.handler");

// The repository instance method is used to check for an existing reservation by someone else.
// To keep this unit test isolated from the database layer, we stub this to always resolve falsey.
vi.mock("@calcom/lib/server/repository/PrismaSelectedSlotRepository", () => ({
  PrismaSelectedSlotRepository: vi.fn().mockImplementation(() => ({
    findReservedByOthers: vi.fn().mockResolvedValue(null),
  })),
}));

// A tiny helper to build a canned handler context with stubbed Prisma methods.
const buildContext = () => {
  const prismaStub = {
    eventType: {
      // Return a minimal event type that will exercise the happy path.
      findUnique: vi.fn().mockResolvedValue({ users: [{ id: 1 }], seatsPerTimeSlot: null }),
    },
    booking: {
      findFirst: vi.fn().mockResolvedValue(null),
    },
    selectedSlots: {
      upsert: vi.fn().mockResolvedValue(null),
    },
  } as unknown as any;

  // Capture header values to assert on.
  let cookieHeaderValue: string | null = null;
  const resStub = {
    setHeader: vi.fn((_name: string, value: string) => {
      cookieHeaderValue = value;
    }),
  };

  const reqStub = {
    cookies: {},
  };

  return { prismaStub, resStub, reqStub, getCookieHeader: () => cookieHeaderValue };
};

describe("reserveSlotHandler cookie settings", () => {
  const originalWebappUrl = process.env.NEXT_PUBLIC_WEBAPP_URL;

  afterEach(() => {
    // Reset the module registry and restore the WEBAPP_URL between tests.
    vi.resetModules();
    if (originalWebappUrl === undefined) {
      delete process.env.NEXT_PUBLIC_WEBAPP_URL;
    } else {
      process.env.NEXT_PUBLIC_WEBAPP_URL = originalWebappUrl;
    }
  });

  it("sets SameSite=None and Secure when WEBAPP_URL is https", async () => {
    process.env.NEXT_PUBLIC_WEBAPP_URL = "https://example.com";
    vi.resetModules();
    const { reserveSlotHandler } = await dynamicImportHandler();
    const { prismaStub, reqStub, resStub, getCookieHeader } = buildContext();
    await reserveSlotHandler({
      ctx: { prisma: prismaStub, req: reqStub, res: resStub },
      input: {
        slotUtcStartDate: new Date().toISOString(),
        slotUtcEndDate: new Date(Date.now() + 15 * 60 * 1000).toISOString(),
        eventTypeId: 1,
        bookingUid: undefined,
        _isDryRun: false,
      },
    });
    const cookie = getCookieHeader();
    expect(cookie).toMatch(/SameSite=None/);
    expect(cookie).toMatch(/Secure/);
  });

  it("falls back to SameSite=Lax and no Secure for http WEBAPP_URL", async () => {
    process.env.NEXT_PUBLIC_WEBAPP_URL = "http://localhost:3000";
    vi.resetModules();
    const { reserveSlotHandler } = await dynamicImportHandler();
    const { prismaStub, reqStub, resStub, getCookieHeader } = buildContext();
    await reserveSlotHandler({
      ctx: { prisma: prismaStub, req: reqStub, res: resStub },
      input: {
        slotUtcStartDate: new Date().toISOString(),
        slotUtcEndDate: new Date(Date.now() + 15 * 60 * 1000).toISOString(),
        eventTypeId: 1,
        bookingUid: undefined,
        _isDryRun: false,
      },
    });
    const cookie = getCookieHeader();
    expect(cookie).toMatch(/SameSite=Lax/);
    expect(cookie).not.toMatch(/Secure/);
  });
});